Cloth mask (left), surgical mask (middle), and a N95 respirator (right) — three different types of COVID face masks. (Craig Arthur photos) About the author: Craig Arthur (MASc, CRSP, P.Eng) is manager ...

A few of the locations that still had respirator-type masks this week included Canadian Tire, whose website showed dozens of the masks still available at its Merivale location and hundreds at 3910 ...

The main advantage of reusable types of respirators are longevity and flexibility. They have cartridges and filters that can be changed to match different contaminants. Dual-cartridge, half-mask ...

Among 534 participants who specified the type of face covering they typically used, wearing N95/KN95 respirators (aOR = 0.17; 95% CI = 0.05–0.64) or surgical masks (aOR = 0.34; 95% CI = 0.13–0.90) was ...

The main advantage of reusable types of respirators are longevity and flexibility. They have cartridges and filters that can be changed to match different contaminants. Dual-cartridge, half-mask ...